50% duty cycle 555 circuit
Source: InternetPublisher:newrudeman Updated: 2021/04/24
Uses external charging transistors and diodes to achieve 50% duty cycle and frequency control. When the 555 discharge transistor is switched off, the 2N2222 acts as a transmit follower. When the discharge transistor is on and 2N2222 is off, C1 is discharged through (R1+R2) at the same rate. The IN4l48 provides temperature compensation.
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